Continuous-Variable Pairwise Entanglement Based on Optoelectromechanical System

Figure 3

Pairwise entanglement between microwave modes with different resonant frequencies in the system containing 3-pair MCs. The first pair resonates at 9 GHz, the second at 37.5 GHz, and for the third at 60 GHz. 9+ or 9− means the MC with positive or negative detuning in the 9 GHz microwave pair, the meaning of positive or negative is the same with Figure 2, as is for 37.5± and 60±. Other parameters are the same with Figure 2.